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Finding the Fourth Proportional to 3,679.71, 5,078.88 and 2,108.73

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Solution

The fourth proportional to 3,679.71, 5,078.88 and 2,108.73 is: 2,910.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.71 : 5,078.88 = 2,108.73 : x
  2. Step 2: Convert to fraction form
    3,679.71/5,078.88 = 2,108.73/x
  3. Step 3: Cross multiply
    3,679.71x = 5,078.88 × 2,108.73
  4. Step 4: Simplify right side
    3,679.71x = 10,709,986.62
  5. Step 5: Solve for x
    x = 10,709,986.62/3,679.71
  6. Step 6: Final answer
    x = 2,910.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.